JPH0810052Y2 - Parking brake device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of use" The present invention relates to a parking brake device connected to a brake operation unit of a vehicle via a cable.

"Prior Art" Conventionally, as a parking brake device of this type, for example, there is one shown in FIG.

That is, the base bracket 2 fixed to the vehicle body 1
And a parking lever 5 rotatably supported by a pivot 3 on a standing wall 2a of the base bracket 2 in a brake operating position where the cable 4 is stretched and a brake non-operating position where the cable 4 is loosened.

Further, the vertical teeth 2a of the base bracket 2 are provided with a plurality of tooth portions 6a, 6a ... Which are connected in a circumferential direction around the pivot 3, and the parking lever 5 is moved from the brake operating position to the brake non-operating position. Sector tooth 6 to restrain non-rotatable
Is supported by the parking lever 5 so as to be swingable between an engagement position in which the parking lever 5 is engaged with the parking lever 5 and a disengagement position in which the parking lever 5 is disengaged from the sector teeth 6 in order to rotatably release the constraint from the brake operating position to the brake non-operating position. A pole member 7 biased in a swinging direction from the disengagement position to the engagement position, and a release rod 8 capable of swinging the pole member 7 from the engagement position to the disengagement position against the biasing force. It is a thing.

[Problems to be Solved by the Invention] However, in such a conventional parking brake device, when the parking lever 5 is rotated from the brake non-actuated position to the brake actuated position, the pole member 7 moves toward the sector tooth 6. There is a problem that the pole member 7 strongly hits the tooth portion 6a each time it gets over the tooth portion 6a, and a large high sound is generated, which becomes an unpleasant sound and impairs comfortability. .

It is generally known that a loud or low tone and a high or low tone do not cause an unpleasant sound.

If grease is applied to the tooth portions 6a of the sector teeth 6 and the pole member 7 so that a high noise is not generated when the pole member 7 hits the tooth portion 6a, the collision noise of the metal comrades disappears and becomes a low noise. Be effective. However,
There is a problem that the state of the oil film of the grease changes due to long-term use, and it becomes the same as the state where the grease is not applied, resulting in a high tone.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a parking brake device capable of improving habitability without generating an unpleasant noise when a brake is operated. Further, it is an object of the present invention to provide various mechanisms adapted to the parking brake device.

[Means for Solving the Problems] The gist of the present invention for achieving such an object is as follows: (1) In a parking brake device connected to a brake operation part of a vehicle through a cable, the parking brake device is fixed to a vehicle body. A base bracket to which the cable is coupled, and a parking lever rotatably supported by a vertical wall of the base bracket between a brake operating position and a brake non-operating position by a pivot, and a vertical wall of the base bracket or the parking lever. One of them is a sector tooth in which a plurality of tooth portions are arranged in a circumferential direction about the pivot axis, and the sector is provided to non-rotatably restrain the parking lever from the brake operating position to the brake non-operating position. An engaging position for engaging a tooth and the parking lever from the brake operating position to the brake non-operating position A direction swingably supported by the standing wall of the base bracket or the other of the parking levers at a disengagement position in which the sector teeth are disengaged in order to rotatably release the restraint, and swings from the disengagement position to the engagement position. A pole member that is urged toward, a release rod that can swing the pole member from the engagement position to the disengagement position against the urging force, and a standing wall of the base bracket or the parking lever. A shock-absorbing bracket supported on the other side and slidably contacting a side surface of the pole member when the pole member swings; and a grease is filled in a gap between the shock-absorbing bracket and the side surface of the pole member. Parking brake device.

(2) The cushion bracket is supported so as to be displaceable between a normal position and an emergency position on a line in which the pole member swings, and is urged in a direction in which it displaces to the normal position, and 2. The parking according to claim 1, wherein, when an excessive load is transmitted from the pole member via grease, the buffer bracket is displaced together with the pole member to the emergency position against an urging force. Brake device.

(3) The cushion bracket is placed in a normal position and a co-operating position in which the cushion bracket swings together with the pole member when an excessive load is transmitted from the pole member to the cushion bracket via the grease. While supporting displaceably, when the cushion bracket swings to the cooperating position,
In order to separate the cushion bracket and the pole member,
2. The parking brake device according to claim 1, wherein a swing angle regulation stopper portion that abuts on the buffer bracket is provided on one of the standing wall of the base bracket and the parking lever.

"Action" The parking lever is in the brake deactivated position, and the cable is in a relaxed state. At this time, the pole member is in the engagement position and is engaged with the tooth portion of the sector tooth.

When the parking lever is rotated about the pivot to the brake operating position, the pole member moves from the engagement position to the disengagement position against the biasing force and the resistance force due to the viscosity of grease.

Further, when the parking lever is rotated to the brake operating position, the pole member rides over the tooth tip of the tooth portion and tries to engage with the tooth portion adjacent to the tooth portion by the biasing force. At this time, the pole member does not vigorously hit the adjacent tooth portion due to the resistance force of the grease, thereby making a small sound.

That is, when the parking lever is rotated to the brake operating position, the pole member strikes the continuous teeth weakly and continuously emits a small sound.

When the parking lever is in the brake operating position, the urging force causes the pole member to return to the engagement position and engage with the tooth portion. Since the pawl member is engaged with the tooth portion, the parking lever does not inadvertently rotate back to the brake non-operating position.

When the release rod is operated against the urging force when the parking lever is in the brake operating position, the pole member swings from the engaging position to the disengaging position. As a result, the parking lever can be rotated to the brake non-operating position,
When the parking lever is in the brake non-operating position and the release rod is released, the pole member engages with the tooth portion of the sector tooth.

When the cushion bracket is supported so that it can be displaced between the normal position and the emergency position on the direction in which the pole member swings, and is biased toward the normal position, the viscosity of grease changes due to low temperature, for example. If the grease resistance becomes extremely high, the parking lever is rotated from the brake non-operating position to the brake operating position, and when the pole member tries to swing from the engaging position to the disengaging position, the grease is removed. Thus, the cushion bracket is displaced together with the pole member from the normal position to the emergency position, which does not hinder the brake operation.

In the case where the cushion bracket is supported so as to be displaceable between the normal position and the co-operating position and the swing angle restriction stopper is provided, similarly, when the resistance force due to grease becomes extremely large, the parking lever is moved to the brake non-operating position. When the pole member tries to swing from the engagement position to the disengagement position by rotating from the engagement position to the braking position, the cushioning bracket is displaced together with the pole member via the grease and becomes the cooperating position from the normal position. When the cushion bracket comes to the cooperating position, it comes into contact with the swing angle regulation stopper portion, whereby the pole member and the cushion bracket are separated, and thereafter the pole member swings independently to the disengaged position, which hinders the brake operation. Never give.

[Examples] Various examples of the present invention will be described below with reference to the drawings.
In addition, in the various embodiments, the same reference numerals are given to the same type parts, and the duplicated description will be omitted.

1 to 5 show a first embodiment of the present invention.

As shown in FIG. 1, the parking brake device 10 is
A foot lever 30 which is a parking lever is pivotally attached by a pivot 22 to a housing 20 which is a base bracket fixed to the vehicle body A such as a dash panel.

A cylinder member 25, which is a shock absorber, is attached to the housing 20, and a rod 26 that can be retracted from the cylinder member 25 is connected to a foot lever 30.

The foot lever 30 is biased in the counterclockwise direction by a spring member (not shown), and the end portion thereof extending substantially radially from the pivot 22 forms a cable connecting portion 31. A foot plate 33 is attached to the tip 32 of the foot lever 30.

At the base end portion 34 of the stepping lever 30, there are provided sector teeth 35 in which a plurality of tooth portions 35a, 35a, ... Are connected in a circumferential direction around the pivot 22.
Is engraved.

The claw 41 of the housing 20 has a tooth portion 35a of the sector tooth 35.
The pole member 40 is swingably supported by the pivot 23 between an engaging position for engaging with the tooth portion 35a and a disengaging position for disengaging the tooth portion 35a. The pole member 40 is urged by a spring member 42 in a direction of swinging from the disengaged position to the engaged position.

The housing 20 has a standby position in which its output end 51 faces the input end 43 of the pole member 40, and the input end 43 of the pole member 40 is pushed against the biasing force of the spring member 42.
A release member (50) is pivotally supported by a pivot shaft (24) at a push-in position where the release member (40) is swung to a detached position.

The release member 50 is urged by a spring member (not shown) in the direction of swinging from the pushing position to the standby position.

At the lower end of the release member 50, a release lever 55 that can swing the release member to the push-in position is connected.
55 is extended to the inside of the vehicle, and a release knob 56 is fixed to the tip of the release lever 55.

As shown in FIGS. 1 and 2, the housing 20 includes a side surface portion of the pole member 40 when the pole member 40 swings.
A buffer bracket 60, which is in sliding contact with the buffer surface 61 of the shaft 44, is pivotally supported by the pivot 23 so as to be swingable.

The arm portion 62 extends from the end of the buffer surface portion 61,
One end of a set spring 63 is connected to the arm portion 62. On the other hand, the housing 20 is provided with a stopper pin 27 which is brought into contact with the arm portion 62 when the shock absorbing bracket 60 swings and restricts the swing of the shock absorbing bracket 60.

The buffer bracket 60 is normally pulled by the biasing force of the set spring 63 to the normal position where the arm portion 62 contacts the stopper pin 27.

In FIG. 1, as shown by hatching, highly viscous grease is filled in the gap between the side surface portion 44 of the pole member 40 and the cushioning surface portion 61 of the cushioning bracket 60. A groove for accumulating grease may be formed in the buffer surface portion 61 of the buffer bracket 60.

 Next, the operation will be described.

In FIG. 1, the rod 26 does not largely project from the cylinder member 25, the foot lever 30 is in the brake non-operating position, and the cable B is in a relaxed state. At this time, the pole member 40 is in the engagement position, and the claw 41 thereof is engaged with the tooth portion 35a of the sector tooth 35.

The tread plate 33 is pushed against the urging force of a spring member (not shown) or the resistance force of the cylinder member 25, and the foot lever is pressed.
When the pivot member 30 is rotated about the pivot shaft 22 to the brake operating position, the pole member 40 swings about the pivot shaft 23 against the urging force of the spring member 42 and the resistance force due to the viscosity of the grease. As shown in FIG. 2, the engaged position is changed to the disengaged position.

Further, when the foot lever 30 is rotated to the brake operating position, the claw 41 of the pole member 40 gets over the tooth portion 35a of the sector tooth 35. As a result, the pole member 40 tries to return to the engagement position by the biasing force of the spring member 42.

At this time, the grease now acts as a resistance force in the opposite direction and acts on the pole member 40, and the pawl 41 of the pole member 40 weakly abuts on the tip of the next tooth portion 35a. Therefore, the collision noise at the time of abutting is also reduced.

That is, when the foot lever 30 is rotated to the brake operating position, the pawl 41 of the pole member 40 has the continuous tooth portion 35.
It hits the tips of teeth a weakly one after another, and emits a series of small sounds without making any unpleasant sounds.

When the foot lever 30 reaches the brake operating position, the pawl member 40 returns to the engaging position by the biasing force of the spring member 42, and the pawl 41 engages with the tooth portion 35a. The claw 41 of the pole member 40 has the tooth 3
Since it is engaged with 5a, the foot lever 30 does not inadvertently rotate back to the brake non-operating position.

When the release knob 56 is pulled against the urging force of a spring member (not shown) when the foot lever 30 is in the brake operating position, the release member 50 causes the release member 50 to pivot via the release lever 55 as shown in FIG. Swing from the standby position to the push-in position around.

As a result, the output end 51 of the release member 50 is connected to the pole member.
When the input end 43 of 40 is pushed in, the pole member 40 swings around the pivot 23, moving from the engaged position to the disengaged position. As a result, the foot lever 30 can be rotated to the brake non-operating position, and the foot lever 30 is rotated by the urging force of the spring member (not shown) to the brake non-operating position as shown in FIG.

When the release knob 56 is released, the lily member 50 returns to the standby position and the pole member 40 returns to the engagement position as shown in FIG. 4 by the biasing force of the spring member 42.

When the temperature decreases or the viscosity of the grease becomes extremely high, the grease causes the side surface portion 44 of the pole member 40 and the cushioning surface portion 61 of the cushioning bracket 60 to adhere to each other.

In this state, when the foot lever 30 is rotated from the brake non-operating position to the brake operating position, the tooth portion 35a of the sector tooth 35 resists the biasing force of the spring member 42 and the set spring 63 to engage the pole member 40. Swing from the combined position to the separated position. As a result, the cushion bracket 60 swings from the normal position to the emergency position as shown in FIG.

Thereby, the brake operation can be performed in the same manner as the normal brake operation.

When the foot lever 30 is in the brake operating position, the pawl member 40 is moved from the disengaged position to the engaged position by the biasing force of the spring member 42 and the set spring 63, and the cushion bracket 60 is moved from the emergency position to the normal position.

When the release knob 56 is pulled, the pole member 40 and the cushion bracket 60 are integrated with each other against the biasing force of the spring member 42 and the set spring 63 via the release lever 55 and the release member 50, and the release position is set. Swing to the emergency position.

When the brake lever is in the non-operating position and the release knob 56 is released, the pole member 40 and the cushion bracket 60 are integrated with each other by the biasing force of the spring member 42 and the set spring 63, as shown in FIG. As described above, the swing position swings between the engagement position and the normal position.

6 to 8 show a second embodiment of the present invention.

As shown in FIG. 6, an arm portion 41a is formed on the pole member 40a, and when the pole member 40a swings between the engaging position and the disengagement position, the buffer groove is slidably contacted with the arm portion 41a of the pole member 40a.
61a is provided on the buffer bracket 60a, and the gap between the arm portion 41a and the buffer groove 61a is filled with grease as shown by hatching.

As a result, as shown in FIG. 7, during normal brake operation, the grease acts to cause the pawl 42a of the pole member 40a to move.
Does not hit the sector teeth strongly and no loud noise is produced.

9 to 11 show a third embodiment of the present invention.

As shown in FIG. 9, it is applied to a manual brake device, and is a pole member provided on the parking lever 70 side.
80 and a cushioning bracket 90 with which the cushioning surface portion 91 slides on the side surface 81 of the pole member 80 are provided, and as shown by hatching in FIG. 10, the side surface portion 81 of the pole member 80 and the cushioning surface portion 91 of the cushioning bracket 90. And a grease is filled between the two, and a protrusion 92 is formed on the cushion bracket 90, and a swing angle regulation stopper portion 95 for contacting the protrusion 92 and restraining the swing of the cushion bracket 90 is provided.

As a result, when the grease becomes viscous due to a low temperature or the like, and when the buffer bracket 90 swings to the cooperating position together with the pole member 80 during brake operation, the swing angle regulation stopper portion 95 causes the projection of the buffer bracket 90 to project. The collision with the portion 92, and the impact causes the shock absorbing bracket from the pole member 80.
90 separates, the pole member 80 separates properly, and the brake can be operated in the same manner as a normal brake operation.

[Advantage of Invention] According to the parking brake device of the present invention, when the parking lever is rotated to move from the brake non-operating position to the brake operating position, the viscosity of the grease filled between the pole member and the cushion bracket is The resistance force prevents the pole members from striking hard when they hit the tooth portions of the sector teeth one after another, so the noise at the time of striking is reduced, and no unpleasant noise is produced, improving comfortability. it can.

Further, since the cushion bracket is configured to swing together with the pole member between the normal position and the emergency position, for example, even when the viscosity of grease increases and the resistance becomes large, the cushion bracket shakes together with the pole member during brake operation. The brake can be operated reliably.

Furthermore, since the cushion bracket swings together with the pole member from the normal position to the co-operating position, and when the cushion bracket swings to the co-operating position, the swing angle regulation stopper portion separates the cushion bracket from the pole member. Even when the viscosity of the grease increases and the resistance increases, the pole member reliably swings between the engagement position and the disengagement position during the brake operation, and the brake operation can be reliably performed.

[Brief description of drawings]

1 to 5 show a first embodiment of the present invention,
FIG. 1 is a front view of a parking brake device, FIGS. 2 to 5 are explanatory views of the operation mainly showing the operation of a pole member and a cushion bracket, respectively, and FIGS. 6 to 8 are second embodiments of the present invention. FIG. 9 shows an example, and FIG. 9 to FIG. 11 show a third embodiment of the present invention.
FIG. 9 is a perspective view of the parking brake device, FIG. 10 is a front view mainly showing the pole member and the cushion bracket,
11 is an exploded perspective view of the same, FIG. 12 shows a conventional example, and is an overall perspective view of the parking brake device. 10… Parking brake device 20… Housing (base bracket) 30… Foot lever (parking lever) 40, 40a, 80… Pole member 50… Release member 60, 60a, 90… Buffer bracket

Claims (3)

[Scope of utility model registration request] 1. A parking brake device connected to a brake operation part of a vehicle via a cable, wherein a base bracket fixed to a vehicle body and the cable are connected to each other, and a brake operation position is pivoted on an upright wall of the base bracket by a pivot. And a parking lever rotatably supported in a brake non-operating position, and a sector in which a plurality of teeth are continuously provided in a circumferential direction around the pivot on one of the standing wall of the base bracket and the parking lever. Teeth, an engagement position that engages the sector teeth to non-rotatably restrain the parking lever from the brake operating position to the brake non-operating position, and the parking lever from the brake operating position to the brake non-operating position. Position to pivotally move to a disengagement position where the sector teeth are disengaged to release the restraint. A pole member that is supported by the vertical wall of the base bracket or the other of the parking levers and that is biased in the direction of swinging from the disengagement position to the engagement position; and the pole member that resists the biasing force. A release rod that can be swung from the combined position to the disengaged position, and a cushioning bracket that is supported by the standing wall of the base bracket or the other of the parking levers and that slides on the side surface of the pole member when the pole member swings. And a gap between the cushion bracket and a side surface of the pole member is filled with grease. 2. The shock-absorbing bracket is supported so as to be displaceable between a normal position and an emergency position on a line in which the pole member swings, and is biased in a direction in which the shock-absorbing bracket is displaced to the normal position. 2. When an excessive load is transmitted from the pole member via the grease, the buffer bracket is displaced together with the pole member to the emergency position against an urging force. Parking brake device described. 3. The buffer bracket in a normal position and a co-operating position in which the buffer bracket swings together with the pole member when an excessive load is transmitted from the pole member to the buffer bracket via the grease. And a swing angle regulation stopper portion that abuts on the cushion bracket so as to separate the cushion bracket and the pole member when the cushion bracket swings to the cooperating position. The parking brake device according to claim 1, wherein the parking brake device is provided on one of the standing wall of the base bracket and the parking lever.